A probe launched by UEFA into PSG’s financial affairs has revealed that the club overstated the value of some of their sponsorship deals, raising questions about how they funded the transfers of Neymar Jr. and Kylian Mbappe over the summer.

The overstate value were said to be worth around €200 million, according to the Financial Times. PSG are said to be facing “a large fine or a ban from taking part in the UEFA Champions League, Europe’s most prestigious club competition” if it’s found they failed to comply with financial fair play regulations.

PSG purchased Neymar from Barcelona for €222 million, while the deal for Kylian Mbappe from AS Monaco could rise up to €200 million after his loan deal with an obligation to buy concludes at the end of the season.

PSG will have to justify the value of various deals in order to avoid being punished by UEFA, who have scheduled their decision to be in June, the conclusion of PSG’s financial year. It would not be the first time PSG have been found guilty of breaching Financial Fair Play. They were fined €60 million in 2014.